This Ayah is an important principle, to follow the Messenger of Allah in all his words, and deeds, etc. Hence Allah commanded the people to take the Prophet as an example on the day of Al-Ahzab, with regard to patience, guarding, striving and waiting for Allah to provide the way out; may the peace and blessings of Allah be upon him forever, until the Day of Judgement. Allah says to those who were anxious and impatient and were shaken by feelings of panic on the day of Al-Ahzab:

[لَّقَدْ كَانَ لَكُمْ فِى رَسُولِ اللَّهِ أُسْوَةٌ حَسَنَةٌ]

(Indeed in the Messenger of Allah you have a good example to follow) meaning, `why do you not take him as an example and follow his lead' Allah says:

[لِّمَن كَانَ يَرْجُو اللَّهَ وَالْيَوْمَ الاٌّخِرَ وَذَكَرَ اللَّهَ كَثِيراً]

(for him who hopes in Allah and the Last Day, and remembers Allah much.)